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15#include <linux/module.h>
16#include <linux/types.h>
17#include <linux/kernel.h>
18#include <linux/string.h>
19#include <linux/ptrace.h>
20#include <linux/errno.h>
21#include <linux/ioport.h>
22#include <linux/slab.h>
23#include <linux/interrupt.h>
24#include <linux/init.h>
25#include <linux/delay.h>
26#include <linux/netdevice.h>
27#include <linux/etherdevice.h>
28#include <linux/skbuff.h>
29#include <linux/spinlock.h>
30#include <linux/mii.h>
31#include <linux/ethtool.h>
32#include <linux/bitops.h>
33#include <linux/platform_device.h>
34#include <linux/of_platform.h>
35
36#include <asm/pgtable.h>
37#include <asm/irq.h>
38#include <asm/uaccess.h>
39#include <asm/mpc5xxx.h>
40
41#include "fs_enet.h"
42#include "fec.h"
43
44
45
46#define mk_mii_read(REG) (0x60020000 | ((REG & 0x1f) << 18))
47#define mk_mii_write(REG, VAL) (0x50020000 | ((REG & 0x1f) << 18) | (VAL & 0xffff))
48#define mk_mii_end 0
49
50#define FEC_MII_LOOPS 10000
51
52static int fs_enet_fec_mii_read(struct mii_bus *bus , int phy_id, int location)
53{
54 struct fec_info* fec = bus->priv;
55 struct fec __iomem *fecp = fec->fecp;
56 int i, ret = -1;
57
58 BUG_ON((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0);
59
60
61 out_be32(&fecp->fec_mii_data, (phy_id << 23) | mk_mii_read(location));
62
63 for (i = 0; i < FEC_MII_LOOPS; i++)
64 if ((in_be32(&fecp->fec_ievent) & FEC_ENET_MII) != 0)
65 break;
66
67 if (i < FEC_MII_LOOPS) {
68 out_be32(&fecp->fec_ievent, FEC_ENET_MII);
69 ret = in_be32(&fecp->fec_mii_data) & 0xffff;
70 }
71
72 return ret;
73}
74
75static int fs_enet_fec_mii_write(struct mii_bus *bus, int phy_id, int location, u16 val)
76{
77 struct fec_info* fec = bus->priv;
78 struct fec __iomem *fecp = fec->fecp;
79 int i;
80
81
82 BUG_ON((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0);
83
84
85 out_be32(&fecp->fec_mii_data, (phy_id << 23) | mk_mii_write(location, val));
86
87 for (i = 0; i < FEC_MII_LOOPS; i++)
88 if ((in_be32(&fecp->fec_ievent) & FEC_ENET_MII) != 0)
89 break;
90
91 if (i < FEC_MII_LOOPS)
92 out_be32(&fecp->fec_ievent, FEC_ENET_MII);
93
94 return 0;
95
96}
97
98static int fs_enet_fec_mii_reset(struct mii_bus *bus)
99{
100
101 return 0;
102}
103
104static struct of_device_id fs_enet_mdio_fec_match[];
105static int fs_enet_mdio_probe(struct platform_device *ofdev)
106{
107 const struct of_device_id *match;
108 struct resource res;
109 struct mii_bus *new_bus;
110 struct fec_info *fec;
111 int (*get_bus_freq)(struct device_node *);
112 int ret = -ENOMEM, clock, speed;
113
114 match = of_match_device(fs_enet_mdio_fec_match, &ofdev->dev);
115 if (!match)
116 return -EINVAL;
117 get_bus_freq = match->data;
118
119 new_bus = mdiobus_alloc();
120 if (!new_bus)
121 goto out;
122
123 fec = kzalloc(sizeof(struct fec_info), GFP_KERNEL);
124 if (!fec)
125 goto out_mii;
126
127 new_bus->priv = fec;
128 new_bus->name = "FEC MII Bus";
129 new_bus->read = &fs_enet_fec_mii_read;
130 new_bus->write = &fs_enet_fec_mii_write;
131 new_bus->reset = &fs_enet_fec_mii_reset;
132
133 ret = of_address_to_resource(ofdev->dev.of_node, 0, &res);
134 if (ret)
135 goto out_res;
136
137 snprintf(new_bus->id, MII_BUS_ID_SIZE, "%x", res.start);
138
139 fec->fecp = ioremap(res.start, resource_size(&res));
140 if (!fec->fecp) {
141 ret = -ENOMEM;
142 goto out_fec;
143 }
144
145 if (get_bus_freq) {
146 clock = get_bus_freq(ofdev->dev.of_node);
147 if (!clock) {
148
149 dev_warn(&ofdev->dev, "could not determine IPS clock\n");
150 clock = 0x3F * 5000000;
151 }
152 } else
153 clock = ppc_proc_freq;
154
155
156
157
158
159 speed = (clock + 4999999) / 5000000;
160 if (speed > 0x3F) {
161 speed = 0x3F;
162 dev_err(&ofdev->dev,
163 "MII clock (%d Hz) exceeds max (2.5 MHz)\n",
164 clock / speed);
165 }
166
167 fec->mii_speed = speed << 1;
168
169 setbits32(&fec->fecp->fec_r_cntrl, FEC_RCNTRL_MII_MODE);
170 setbits32(&fec->fecp->fec_ecntrl, FEC_ECNTRL_PINMUX |
171 FEC_ECNTRL_ETHER_EN);
172 out_be32(&fec->fecp->fec_ievent, FEC_ENET_MII);
173 clrsetbits_be32(&fec->fecp->fec_mii_speed, 0x7E, fec->mii_speed);
174
175 new_bus->phy_mask = ~0;
176 new_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
177 if (!new_bus->irq) {
178 ret = -ENOMEM;
179 goto out_unmap_regs;
180 }
181
182 new_bus->parent = &ofdev->dev;
183 dev_set_drvdata(&ofdev->dev, new_bus);
184
185 ret = of_mdiobus_register(new_bus, ofdev->dev.of_node);
186 if (ret)
187 goto out_free_irqs;
188
189 return 0;
190
191out_free_irqs:
192 dev_set_drvdata(&ofdev->dev, NULL);
193 kfree(new_bus->irq);
194out_unmap_regs:
195 iounmap(fec->fecp);
196out_res:
197out_fec:
198 kfree(fec);
199out_mii:
200 mdiobus_free(new_bus);
201out:
202 return ret;
203}
204
205static int fs_enet_mdio_remove(struct platform_device *ofdev)
206{
207 struct mii_bus *bus = dev_get_drvdata(&ofdev->dev);
208 struct fec_info *fec = bus->priv;
209
210 mdiobus_unregister(bus);
211 dev_set_drvdata(&ofdev->dev, NULL);
212 kfree(bus->irq);
213 iounmap(fec->fecp);
214 kfree(fec);
215 mdiobus_free(bus);
216
217 return 0;
218}
219
220static struct of_device_id fs_enet_mdio_fec_match[] = {
221 {
222 .compatible = "fsl,pq1-fec-mdio",
223 },
224#if defined(CONFIG_PPC_MPC512x)
225 {
226 .compatible = "fsl,mpc5121-fec-mdio",
227 .data = mpc5xxx_get_bus_frequency,
228 },
229#endif
230 {},
231};
232MODULE_DEVICE_TABLE(of, fs_enet_mdio_fec_match);
233
234static struct platform_driver fs_enet_fec_mdio_driver = {
235 .driver = {
236 .name = "fsl-fec-mdio",
237 .owner = THIS_MODULE,
238 .of_match_table = fs_enet_mdio_fec_match,
239 },
240 .probe = fs_enet_mdio_probe,
241 .remove = fs_enet_mdio_remove,
242};
243
244module_platform_driver(fs_enet_fec_mdio_driver);
245
